Method and apparatus for producing sheets from glass under pressurf



May 15, 1928. 1,670,167

J. A. REEc;

METHOD AND APPARATUS FOR PRODUCING SHEETS FROM GLASS UNDER PRESSUREFiled Jan. 30, 1925 I NV E N T UR. o/ocepb /7. Peace.

- is formed therein, laid pool pressure and luv ly draw' Patented s15,1928.

UNITEDSTATES Joann: a. men. or'ronmo. onio. micron ro comm, or roun-x10,

PATENT OFFICE.

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The present invention relates to sheet glass apparatus, and hasparticular reference to an apparatus wherein a sheet is continuouslydrawn from an relatively restricted pool.

An important ob'ect of the invention is to provide a sheet 3 assapparatus wherein a floating pool is created upon a man of molten glass,said pool being re substratum glass from the means for pool.

A further object of the invention is to provide sheet glass drawingaiparatul wherein a deputer is partially su merged in a mass of moltenglass in a maner that a pool of glass is formed in said deputer fromwhich a sheet of glass may be drawn.

.3. still f". her object of the invention is to provide a sheet glassapparatus wherein a deputer is partially submerged in a mass 0! moltenglass in a manner that a lof glass ing under th communitclationlwith themassso atitcan constan yrep enished,' said deputer having associatedtherewifii means for heating the same to properly condition the glass,and means for continuousasheetfromaaidpool.

Other 0 jects and advantages of the in tion will becomes parent duringthe course of the following eacription.

In the drawings wherein like numerals are employed to designate hke.parts thioughout the same, ed

ig. 1 is a iragmen .verti ng'itudinal section through m ?nprovedconstructio I ig. 2 is a fragmentary vertical transverim secltionthereof and t becti i is a en ry ve view of on e form of deputer whi hmay in accordance with the present invention.

It is to be' understood that my invention is not restricted to the ofmachine closcdinthcdrawingsw ereinthesheetia deflected from a verticalto a horizontal plane; as the same construction can be used in verticaltype machines, etc.

In the apparatus disclosed a tank furnace 5, having a mass of molten 6therein, is in open communication wi a pot 7. Arranged above the pot 7are cover-tiles 8 which prevent heat currents from striking thesheet 9which isbeingdrawn.

plenishedtrom maqaiidincludel to wing a sheet from the said {no Thenumeral 10 designates 'a de star which may be formed from a refractoryclay or some suitable heat-resistin non-corrosive alloy. The deputer 10is pre erably formed in an integral structure, and is rovided with theinternal chambers 11. T e de uter 10 has the side walls 12, and theinwardly extending flange portions 18 which rm an elongated slot 14which permits lten glass to flow from the mass 6 to within the saiddeputer. As is clearly shown in Fig. 1, the shape of the deputer is suchthat a so-c'alled floating pool is formed therein from which the sheet 9can be continuously drawn. Due to the slot 14, the floating pool 15 iscontinuously replenished from the mass 6. The slot 14 is preferably ofsuch a width that the draw of the sheet 9- will be rapid enoiigh tomaintain the level of the floatin pool 15 substantially lower than thelev of the glass 6 in the pot 7, so that the floating pool will be underpressure, thus facili tating a rapid draw of sheet therefrom.

The deputer 10 is provided with the angular extensions 16 having anaperture 17 formed therein through which a screwthre'aded shaft 18 maybe run, thus permitting nuts or the like 19 being operated upon theshaft to raise or lower the said deputer. The depthof the pool 15 andthe rapidity of draw can be determined somewhat by the depth of thedeputer within the mass ot glass 6.

To produce a pool 15 capable of forming a sheet source 20 of the desiredtemperature. heating means 21 are preferably arranged above the sidewalls of the deputenand are permitted to throw a flame down within thecompartments 11 fprmed therein. This will prevent sta nation of theglass in and around the eputer, while at the same time it will prevent areduction in temperature of the glass coming in contact with the deputerwhich ordinarily would be relatively cooler than the glass 6, and wouldpossibly cause devitrification of the glass; To facilitate drawing of asheet from the pool 15, heat-absorbing means are provided, and may bearran any distance from the sheet 9 as des' The ends of the deputer areslotted as at 23, and are adapted to receive the edges 24 of the sheetbeing drawn in a manner that a drag will be created sufficient to buildup With such a type of apparatus a floating poolcanbecreat unamamofmolten glass from which a s eet of glass can continuously bedrawn. The advantages of such a construction residein the fact that thesheet is formed from substratum glass, while at the same time or othersurface defeet: will not be formed in the sheet Claims: L Incombinationiaamreoeptacle containing a mass of molten g a containerwithin the molten glass for segregating a pool of glass from said mass,means for drawing a sheet from said pool, said container having anopening in its bottom through which less passes from said mass to saidland irig rovided with internal 0 embers, above the mass of molten glassat either side the container to protect the sheet being drawn, and aheating means above the container at each side of the sheet inwardly ofsaid cove ice for coventires am 2 1,e7o,1e1 an edge bapable of maintainthe sheet to directin a time downwardly into the i :5 width after it isdrawn trom e pool 15. ternal c ambera of said container.

2. In combination, a receptacle containing a mass of moltrn lass, acontainer within the molten ,glass or segregating a pool of glass fromsaid mass, means for drawing a s ect fiom said pool, said containerhaving an opening in its bottom through which lass passes from said wasto said pool and mg provided with internal chambers, cover-tilesarranged above the mass of molten glass at either side of the containerto pr'otect the sheet being drawn, a heati means above the container ateach side of e sheet inwardly of the cover-tiles for directing a flamedownwardly into the internal chambers of said container, and coolersarranged above the pool at opposite sides oi the sheet and inwardly ofthe said heating means.

Signed at Toledo, in the county of Lucas and State of Ohio, ary, 1925.

JOSEPH L nnncn this 27th day ofJanu-' 45

